NPD has been doing a bit of math, and according to its figures for the 12 months ending October 31, the dance genre has grown 326% percent year-over-year. When compared to overall videogame sales, the later has only grown yoy by 3%. Last month, NPD noted that the dance category was up 135% when comparing October 2010 figures to the same period in 2011. Two titles which can help confirm the growth in the genre are Just Dance and Dance Central: the former is up 85% yoy in sales and the later passed the 2.5 million sales mark in August of this year. According to NPD, 8 out of every 10 players of dance games are female, the majority of which are teenagers or younger.